Magneto-coil-aligning tool



March 27, 192s. 1,663,595

C. F. HARPER MAGNETO COIL ALIGNING TOOL Filed Dec. 6. 192.6. 2 Sheets-Sheet 2 zx j Inventor Clarence Fjflyner ttormgy Patented Mar. 27, 1928i.

- CLARENGE FREDERIC HARPEmoFHAfRPnn TEXAS. -V

MAGN'iio-cort Application mea December e, iezs. seiainofisizae'z.

.- This inventionmrelates to a tool adapted for use in aligningA magneto coils VWhieh is partieularly adapted for' aligning the -coils in a Ford type of magneto.v

This invention oomprehends the provision of a simple tool which may be readily applied and set on the Wheelofthe vFord type magneto to gangs the relation of the mounting of the magnet thereon, .relativeto the mounting of the fly wheel on the end of the crank shaft, in such ainanner thatthe gauge may then be removed from f the fly Wheel `and applied on fthe flange on the crank shaft so that the coilsoftheinagneto l5 nia-y be properly set von their supporting structure, for spacing the proper distance from the ends of the permanent Lmagnet when thefly Wheel and the magnets are mounted in assembled relation, on the crank shaft.

Y In vthe present'praetice in theaft, `when it is necessary torenew orreplac'e the magnets in the magneto ofthe 'ord'typeof lnot'the ily Wheel and assembled structure {mast-be' entirely removedl from the flange on ivliioh it is secured to the Crankshaft to :permit aeeess to the vmagnets and the coils, `an`d"inreplac-y ing any or a'll of theooilsthey ,miistfbefset on `the support-ing structure therefor in such "a manner `that the ends vof the lcoils disposed toward the permanent magnets yon the fly Wheel, shall be 'spaoedfapproiiimately one-thirtyseoond of an inchA from these magnets.

In order to obtain thejproper 'setting of the Coils relative tothe magnet-sforoperation in the Iassembled relation of the parts.`it is found necessary to frequently' apply andremove the fly VWheel from theendofftho crank shaft, Vand :to ehangethe setting of the magnet following suoli applicatiomwt'o determine the 'proper f spacing ,of Vthe ,Coils yfrom the magnet, by kplacing shims/between the coils and the supporting struotuieQor yremovof the coils-is obtained,

This frequentv assemb p Y l yof the fly `wheel on the 'crank shaft requires considerable time and labor4 Whichtliis'in'- vention :is ydesiggnecl to eliminate.4 "In `e l imiv nating this time -a'nd laborin eonnetion` With the frequent yassembly and ,disassem-- lbly of the flywheel on the "end ofthe crank shaft, this invention .provides 'a tool which may be assembled ongthe Wheel, in the disassembled relationfthereof Vfrom the `Crank ing sai'd shims until the proper setting of allv 1y ana aisass'isili-b1yV Shaft, Suitable means'thereon'may :set to determine the yrelation of the magnets and the mounting of vthe fly "Wheel o'n the crank shaft, following which vsetting lthe d evfce "in'ayftlien be 'removed yfronrthe fly Wli'eelgaild applied l to the vcrank shaft' so V'that the poi'- tion thereof set to the position of `tlie"in`a'g' nets, lie in the same position 4that the magnetsy assume vthe a'ssnibl'etlf relation of they parts, Aan'idtl'iro'iigh v4the devi'c'e, 4the 'eo'fils maybe suitably"secued` on ttheirsupport to provide the proper spaoingbetvveen theends'and the'tool, Sothat when the Vfly vWheel isthereafter assembled ontliebrank ,l shaft, "the same spaoing'will he obtained.,

The, 'invention Ciiiprehends ynainerous "other "objee is residing' 1n`tlie details Con- Nstrifction, and the arrangement of the4 parts 'for oirying 'out'ftlie invention, which are moefpartieularlyf pointed out inV the followjing ldloriptifon d'etail, tand in the Claims directed ,to the vpreferred' fm 'of TVt`lie`eonstriition, fit being understoodlioWever, that 'variousfehanges inthe size,I shape and arrangement of the parts maybeanadeivithout departig'from'the spirit vforfsoop`e of the i'iyention jas herein set forth.

the drawvings'formin'g partoftlns ap- 'filiation 1 e Figure li"s"a vertical* sectional vvieiv vthru the tool formingfthesub'jeot :mattr'ff'this 'invntion, in ivliichthe several'partsof the tool tare shown in assembled relation.

Fig. 2`is 'an end elevationof lthe tool' as shown in Figfl, taken 'at the left hand side, asfshownin Fig.' l.

Fig. 3 'shovvs the `tool applied to the lend of the Crank shaft of ltheFord type of motor, and illustrates liow ythe `mag'gneto 'coils are aligned therewith, to obtain tli e"proper setting 'ofthe foils forthe assembled relation f .the g'il'eo v Fig. 'lfshows thelriianner of setting the tool on the ivheel, in Vorder thatu it may 'be4 subsequently used.l asshvvn in Fig; 3, for setting the odilson'ftlieir su ports.

shatters, the cfa-ni; shaft beingjindiated at 3,'1a'nd 'having theiflange, on the tre-'ar end therfeo-f. Asuitable supporting ring 5 vis seured` to the cylinder block l on which are the rear bearing .fortlieorankgv mounted a plurality of electro-magnetic coils 6 in circumferential relation, projecting latorally from the rear peripheral portion of the ring in the usual manner.

The usual fly wheel 7 is formed with an annular socket 8 and as shown in Fig. 4, so as to receive the flange 4 on the end ofthe crank shaft 2 secured by suitable bolts in a well known manner. This fly wheel on the face adjacent to the ring 5, carries a plurality of radially arranged permanent magnets 9 secured to the fly wheel by suitable clamp plates 10, in a manner known in the art.

ln the assembled relation of the-magnets, and the coils G with the fly wheel assembled on the flangeI 4 of the crank shaft, it is necessary for the proper operation of the magneto that the faces of the clamp plates 10 be spaced a. distance 31E inch from the ends of the coils 6.

In the repair and replacement of parts of the magneto, it is always necessary to disassemble the fly wheel from the flange 4 of the crank shaft, in order to obtain access to the coil 6 and the magnets 9. After the fly wheel is disassembled from the crank shaft, there is no manner in which the proper setting of the coils 6 to obtain the proper spacing of the ends of the coils from the clamp plates 10 can be determined except by replacing th-e fly wheel in the assembled relation on the crank shaft, so that in renewing any coil 6 of the series arranged in circumferential relation on the supporting ring 5, it is the usual practice to determine the proper spacing of the coil from the clamp plates to reassemble the fly wheel after placing the new coil in what is believed torbe the proper position, and then determining` whether the spacing of the end is proper.

This operation frequently requires several operations of assembling and disassembling the lly wheel on the crank shaft, and the placing or removing of shims from the coils and the support 5 until the proper distance in the assembled relation of the fly wheel on the crank shaft, obtained between the clamp placed in the end of any particular coil or coils.

This invention in eliminating the necessity for frequently reassembling the fly wheel on the crank shaft to determine the proper setting of the coils, provides a spool member 11 which includes the body member 12 having the annular outwardly projecting flange 13 on one end thereof, and the annular plate member 14 removably and rotatably7 secured to the other end thereof, through the medium of the .retaining screw 15. The end of this retaining screw 15 threadedly receives a nut 16 on the end thereof within the socket 17 of the body member 12, against which seats the compression spring 18 and engaged with the bottom of the recess at its other end, so

also well as to provide a desired tension on the bolt 15 to effectively retain the annular plate 14 in firm engagement with the end of the body 12.

The flange 13 is provided with the. diametrieally opposite pairs of openings 19 and 20 respectively, the openings 19 being adapted to receive suitable bolts 21, as shown in Fig. 4, for securing the body in the recess 8 of the ily wheel. These bolts extend through the usual opening for receiving the bolts which attach the fly wheels to the flange on the crank shaft, and the openings 2O are adapted toreceive the pins 22 provided on j the fly wheel in the recess S as shown in Fig. 4, which j'n'edetermines the position of the liy wheel in its mounting on the crank shaft.

ln this position of the spool 11 as shown in Fig. 4 on the fly wheel, the plate 14 is spaced outwardly from the face of the fly wheel beyond the plane of the clamp plate 10 securing the magnets in position. An arm 23 is secured to the face of the plate 14 by suitable bolts 24 and projects radially from the disk 14, terminating adjacent the outer edge of the fly wheel and in one side thereof, as clearly shown in Fig. 4, Awhere it mounts the gauge screw 25, having the enlarged head 26 provided on one end thereof.

This gauge screw is adapted to be locked in a set position of adjustment by the set screw 27, threaded in the end of the arm 23.

When it is desired to set the coils of a magneto on a supporting ring 5, in the proper position to be spaced gli of an inch from the clamp plates 10 on the fly wheel, in the assembled relation of the fly wheel on the crank shaft, the fly wheel assembly is removed from the crank shaft in the usual manner, and the desired coils 6 removed and replaced by new coils. During the replacing of these coils, this device is used first by securing the spool 11 in the socket $3 formed in the fly wheel as clearly shown in Fig. 4. in order that the plate 14 will support the arm 23 in spaced relation beyond the transverse plane of the magnet 9 and the clamp plate 10 on the fly wheel` so that the bolt connection between the disk 14 and the body 12 will permit rotation of the arm after the spool is secured in place on the fly wheel.

With the arm 23 secured in this relation to the fly wheel 7, the gauge screw 25 is then in position to be moved in the end of the arm so that the head 26 thereon may have its face engaged with the clamp plate 10. This engagement will be with -such slight pressure that the arm may beV rotated about the spool to obtain the proper gauging for each clamp plate on the fly wheel. When this setting of the gauge screw 25 is properly determined, the set screw 27 lis threaded inwardly in the arm to lock the gauge screw in the set position.

When the bolts 24 are removed from the disk 14, and following which the thus-freed lill arm 23 is then applied to the face of the flange l on the crank .shaft as shown in Fig. 3, the same bolts are used for securing said arm to 'the flange. The face of the head 26 of the gauge screw in the position shown in Fig. 3, will then assume the same position as the spacesof the clamps l() will assume when the fly wheel is assembled on the crank shaft, so that it will be readily seen that the coil 6 which is being renewed on the support 5 can be properly adjusted to set the space thereof g1; of an inch from the face of the head 26 on the gauge screw 25 by properly inserting or removing shims 28 from between the coil 6 and its support 5.

When the proper setting of the coils has been obtained for each coil on the ring 5, the mechanic will then know that all of the coils are properly positioned to yhave the proper spacing' between the ends thereof and the clamp plates l0 in the assembled relation of the fly wheel on the crank shaft.

Following this, the spool and the arm 23 are removed from the ily wheel and the crank shaft respectively, and the ily wheel then assembled on the flange of the crank shaft in the usual manner, and the proper spacing of the ends of the coil 6 from the clamp plates will thereby be obtained.

It should therefore be readily appreciated that a highly novel and useful tool construction has been provided for use to eliminate substantial time and labor heretofore necessary in mounting and properly positioning the coils of a Ford magneto on the support therefor, so that they will have the proper spacing from the clamp plates on the fly wheel in the assembled relation of ythe Palts- V Having thus described my invention, what l claim as new is l. An implement for facilitating the adjustment of magneto coils, comprising a cylindrical body member having means at one end whereby it may be detachably connected to the crank-shaft side of a fly wheel with the axis of the member in alignment with that of the wheel, the side of the wheel having secured thereto magneto parts comprising Vthe circular series of permanent magnets and their clamp plates, a disc member, means for rotatably mounting the disc member at the free end of the body nember with the axes of the two members in alignment,

an arm removably mountedk at one end on said dise member and extending radially therefrom, said arm having threaded through its free end a gage screw extending parallel to the axis of the members so that it'may be adjusted to contact with the magnet clamp plates on the wheel, the axial dimensions of the said members being such that, after said gage screw is thus adjusted and the arm detached from the disc member, the arm may be correspondingly secured to the ily-wheel flange of the crank-shaft so that its gage `screw may be utilized in axially positioning the magneto coils distributed about the shaft. f 2. An implement for facilitating the adjustment of magneto coils, comprising a body member having means at one end whereby it may be detachably connected to the crank shaft side of a flywheel, a disk member, means for rotatably mounting the disk member at the free end of the body member, an arm adapted to be removably mounted at one end on the outer face of said disk member so ask to extend radially therefrom and means for detachably securing the arm to said member, said means being adapted, upon detachment of the arm, to be utilized to secure the arm to the ily wheel flange of the crank shaft. j

In testimony whereof I aihx my signature.

CLARENCE FREDERIC HARPER. 

